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Sticker of Common red-legged robberfly
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Common red-legged robberfly

Dioctria rufipes

The common red-legged robberfly is a slim, black hunting fly. Its front legs are bright orange-red, while its back legs are mostly black. It snatches other insects out of the air and stabs them with its hard, sharp mouth.

Lives in
Most of Europe, including Estonia, and parts of Asia, along hedges, woodland edges and scrubby grassland
Length
0.8 to 1.5 cm (0.31 to 0.59 in)
Top speed
about 11 km/h (6.8 mph)
Flying, estimate
Can it hurt you?
Harmless
It is not dangerous to people. It is best to just watch it hunt.
What does it eat?
It hunts other insects, mostly small wasps, sawflies and little flies. Its young hunt too, down in the soil.
For real!Photo of Common red-legged robberfly
Picture by Hectonichus. CC BY-SA 3.0, via Wikimedia Commons.

How big is it?

How long is it?

Common red-legged robberfly about 1.5 cm long (0.59 in)A grain of rice about 6 mm (0.24 in)A toy building brick about 3.2 cm (1.3 in)A crayon about 9 cm (3.5 in)
as long as 2.5 grains of rice in a rowcould fly across a whole football pitch in 34 secondsmoves 200 times its own body length every second

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cool stuff

Fun facts

1

Its young, the larvae, also live as hunters in the ground.

2

It especially likes to catch small wasps that lay their eggs in other insects.

3

You can see it from May until July or August.

4

It is hard to tell apart from its close cousins, even for experts.

you asked

Most asked questions about Common red-legged robberfly

?What does the common red-legged robberfly eat?

Other insects, especially small wasps, sawflies and little flies.

?How big is the common red-legged robberfly?

Its body is about 8 to 15 millimetres long.

For bug experts

Scientific name
Dioctria rufipes
Group
Flies and mosquitoes
Family
Asilidae
Classification
Insecta > Diptera > Asilidae
Lives on
Europe, Asia

Where the facts come from

  1. Dioctria rufipes (Wikipedia, CC BY-SA 4.0): what it looks like, where it lives, what it eats, sizes and fun facts, retold in simple words.
  2. Picture by Hectonichus. CC BY-SA 3.0, Wikimedia Commons. The sticker of this bug is drawn from this picture.

If we got something wrong, sorry, we are bug fans, not a science journal. Tell us at [email protected] and we will fix it.

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